I've been chewing on this, and arguing about this for 3 years.
My older daughter, L/L, is 15u. She played a full season of SS at 11u. At 12u she got moved to CF by another coach, where she has been since.
She got moved, essentially, because coaches saw no future for her in the infield. Because she's a lefty. But this always led to this point by me (especially at the younger levels): are you the coaches developing players, or winning games?
If we are developing players, and she was "destined" to be a CF, fine. She loves it there now.
But I spent a season or two, 12u and 13u, where my daughter would have made more plays than the SS while my daughter was "developing" by standing around in the outfield. At the same time, the teams were "riding" one pitcher to try to win, while we were actively NOT developing a couple of other pitchers who had potential. So I kept asking (privately, or only when someone would ask me) if we're developing players we need to be using all three pitchers. If we're winning ballgames, we need to have players in the key spots who will make the most plays.
On the technical side of it: IMO there are several factors you should look at. My older daughter may still have the quickest release on her current team and is the 2nd fastest running. So depending on where she plays (this one is key) and how quickly she releases, are you (the random coach) sure that the time from bat-hits-ball to ball-hits-1B shorter with a right hander? Or do you just THINK it must be slower with a left hander? What weight to you give to how much ground a player can cover, or how quickly they can get to a ball?
Funny because my 13u daughter got moved from her "home" of 3b to SS last year. She does not have the lateral mobility my older daughter has, she detests "waiting" on the ball so she plays in 2-3 steps closer than most SS. She has a gun for an arm, meaning that every ball is a rope. But her pure release time is not nearly as fast as my older daughter. Yeah, she plays the position fine. But I was amused that she got as matter-of-factly moved into the position, despite a couple of limitations, as my old daughter got matter-of-factly moved out of it because of her "disability."